The sanctuary was formed as a direct result of the construction of the Okhla Barrage in 1986.
It sits at the unique intersection of the Yamuna River floodplain and the urban sprawl of the National Capital Region.
The wetland attracts significant numbers of white-rumped vultures and other critically endangered avian species during peak migration.
The sanctuary's ecosystem is heavily influenced by the seasonal regulation of water levels at the Okhla Barrage.
More than 30 percent of the sanctuary's area consists of wetlands, making it a rare riparian habitat in the region.
Okhla Bird Sanctuary is a 4-square-kilometer wildlife refuge situated at the mouth of the Yamuna River, where it enters Uttar Pradesh from Delhi. The area is defined by a large water body created by the Okhla Barrage, which serves as a critical wetland habitat. It hosts over 300 bird species, including significant populations of migratory waterfowl that arrive during winter. The sanctuary is characterized by dense marshland, thorny scrub, and open water channels. It is recognized as an Important Bird Area (IBA) by BirdLife International. The landscape is primarily shaped by the river flow and silt deposition around the barrage structure. It functions as a vital green lung for the densely populated Noida and Delhi urban corridor.
The elevated observation decks overlooking the main water channel near the barrage.
Bring high-magnification binoculars, as many bird species remain distant from the walking trails.
Wear insect repellent to protect against mosquitoes prevalent in the wetland areas.
Stay on the designated gravel paths to avoid disturbing nesting sites in the tall grass.
Do not wander into non-designated paths or marshy areas, as terrain can be unstable and nesting birds are easily agitated.
Maintain silence to avoid startling wildlife; avoid wearing brightly colored clothing that may scare off birds.
